Just an idea that crossed my mind, please ignore if you've tried it. I wonder if encrypting the executable within the mail application would do the trick so that it can not be opened without inputing some passphrase. I thought of changing permissions, but maybe you need to change them back again after permission repairs.
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ismailJan 16 '13 at 21:47

5 Answers
5

I haven't seen an app like that, but if you have a Gmail account you can use 1Password (App Store Link) to access the web interface. The 1Password app is locked by default. This would work with any email account with a webmail interface.

I like your idea so up voting you. The only thing I can think of why someone may have down voted you is a browser may not be considered a mail client
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markhunteSep 21 '13 at 22:09

Doesn't answer the question. Question asks for an email client, not an html browser. This is more of a work-around IF your provider happens to have a good mobile front end...
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DeepSpace101Mar 19 '14 at 23:52

What kind of server are you accessing? If you use Exchange, check out Mail+ for Outlook. They have an easy to set passcode option which prompts you for a pin each time the app is launched. If you do not successfully provide the passcode within 5 attempts, your credentials and all emails are erased.

If you are using ActiveSync (or have ActiveSync for Gmail), check out their other version. It uses similar technology.

We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.

We need more information that explains why your answer meets the OP's requirements. Links or pictures would be appreciated.
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sameetandpotatoesSep 21 '13 at 20:56